exclamation point

noun
1.
the sign (!) used in writing after an exclamation.
2.
this mark sometimes used in writing two or more times in succession to indicate intensity of emotion, loudness, etc.: Long live the Queen!!
3.
this mark sometimes used without accompanying words in writing direct discourse to indicate a speaker's dumbfounded astonishment: “His wife just gave birth to quintuplets.”(!)
Also called exclamation mark.


Origin:
1860–65

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
exclamation mark or (US) exclamation point
 
n
1.  the punctuation mark ! used after exclamations and vehement commands
2.  this mark used for any other purpose, as to draw attention to an obvious mistake, in road warning signs, (in chess commentaries) beside the notation of a move considered a good one, (in mathematics) as a symbol of the factorial function, or (in logic) occurring with an existential quantifier
 
exclamation point or (US) exclamation point
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Cultural Dictionary

exclamation point definition


A punctuation mark (!) used after an abrupt and emphatic statement or after a command: “‘Help!’ he cried, as his boat floated toward the edge of Niagara Falls.”

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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FOLDOC
Computing Dictionary

exclamation mark definition

character
The character "!" with ASCII code 33.
Common names: bang; pling; excl (/eks'kl/); shriek; ITU-T: exclamation mark, exclamation point (US). Rare: factorial; exclam; smash; cuss; boing; yell; wow; hey; wham; eureka; soldier; INTERCAL: spark-spot.
The Commonwealth Hackish, "pling", is common among Acorn Archimedes owners. Bang is more common in the USA.
The occasional CMU usage, "shriek", is also used by APL fans and mathematicians, especially category theorists.
Exclamation mark is used in C and elsewhere as the logical negation operation (NOT).
(1998-09-17)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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Example sentences
The exclamation mark is a neat and concise sneer at the legal profession.
Outside these narrow limits the exclamation mark must not be used.
Additionally, a red exclamation mark will appear next to a noncompliant vaccine
  on the right side of the screen.
Kathy puts the exclamation mark on great customer service.
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